OFFSET
1,1
COMMENTS
Column 5 of A224012
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 21*a(n-1) -141*a(n-2) +427*a(n-3) -546*a(n-4) +526*a(n-5) -2124*a(n-6) +3302*a(n-7) +2396*a(n-8) +7504*a(n-9) +580*a(n-10) +1632*a(n-11)
EXAMPLE
Some solutions for n=3
..0..0..0..0..1....0..0..1..2..2....0..0..2..2..2....1..1..2..2..2
..1..1..1..2..2....0..1..2..2..2....0..1..1..1..2....1..1..1..1..2
..0..2..2..2..2....1..1..2..2..2....0..0..1..2..2....0..0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 30 2013
STATUS
approved